In terms of autumn shows Jobless Reincarnation is the biggest standout. Loved season one.
Platinum End is done by the same writer as Death Note so that could be one to watch although I have heard less than promising things from that one.
86 season one, or what I watched it from looked decent so the new cour gives me a good incentive to watch the first season.
Yuuki Yunna is a Hero season three is a dark magical girl series. First two seasons were solid so I am happy a third is coming out.
Senpai ga Uzai Kouhai no Hanashi looks like it will be a decent slice-of-life/romantic anime series which is a similar vein to Uzaki wants to hangout although it would seem it is a role reversal (normal girl and annoying guy this time around).
There are other series that could be good so I will have to delve deeper later in September. I did hear some rumours of Demon Slayer season two coming out in October but I have not heard this from any reliable websites so far making me doubt this will happen but you never know.